hello i have a 1999 f350 7.3l with ts 6 position chip it has 245,000 miles recently started running and idleing really rough noticed the oil pressure gauge shows 0 we have replaced the ipr valve and the icp no help smoothes out at higher rpm hard starting and shakes whats next to check and info would be great also changed oil because there was fuel in it but no help either

if you got fuel in your oil, you need to check orings on injectors. Might as well, buy thee entire kit to replace all the orings.

Going on a limb here, but if oring/s are bad, then i can see how the lpop cant create pressure..(low oil pressure), with a shot oring, or the lpop itself is just bad too. Melling 208 is what they replace them with....but fuel in oil, you need to find the culprit.

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